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And then there was chickens

A 150-million-year-old fossil of Archaeopteryx, long considered the oldest bird, may put to rest any scientific doubt that dinosaurs%u2014specifically the group of two-legged meat-eaters known as theropods%u2014gave rise to modern birds. Until recently, the crow-size specimen was housed in a private collection. It is now owned by the Wyoming Dinosaur Center in Thermopolis.
Earliest Bird Had Feet Like Dinosaur, Fossil Shows